Disclaimer, I do not own any filogic devices, nor do I care all that much about the actual limit (as long as it remains 'reasonable' for my use), but based on 128 association limit on 2.4 GHz Mediatek chipset, Ubiquiti NanoHD / U6-LR? one might suggest a 128 STA limit.
There are a couple of caveats here:
- the 2.4 GHz WLAN chipset in question is embedded into the 'old' mt7622 SOC and 'only' 802.11n capable, things may have changed for filogic and their ax radios (or not)
- as detailed in the referenced topic, there are physical airtime issues to be considered
- chipset/ EEPROM/ proprietary firmware/ mt76 driver support might have slightly different limits, depending on the exact radio hardware (model & revision) in question